Speaker
Description
The Standard Model (SM) of particle physics, despite its remarkable predictive success, is widely recognised as incomplete. Effective Field Theories (EFTs), and in particular the Standard Model Effective Field Theory (SMEFT), provide a systematic framework to parametrise possible effects of physics beyond the SM.
In this talk, I review the consistent inclusion of higher-order effects, specifically Next-to-Leading Order (NLO) corrections and Renormalisation Group Evolution (RGE), within a global SMEFT analysis. These ingredients are essential for obtaining reliable theoretical predictions and for consistently relating observables measured at different energy scales.
We critically assess a global fit that combines theoretical and experimental information (mainly LHC data but also other experiments) from a wide range of observables. Building on this framework, we systematically incorporate NLO and RGE effects and demonstrate their significant impact on the determination of Wilson coefficients, their correlations, and the resulting interpretation of constraints on new physics.
Finally, we discuss these results in two phenomenologically relevant scenarios: first, under the assumption of a flavour symmetry in the new physics sector, and second, allowing for flavour-violating operators, highlighting the most relevant features and implications in each case.